#include <iostream>
#include <openCV/highgui.h>
#include <openCV/cv.h>

const unsigned char* getPixel(const IplImage* img, int x,int y);
unsigned char* getPixel(IplImage* img, int x,int y);
IplImage* filtre(const IplImage* img,int l);
IplImage* filtreGaussien(const IplImage* img,double sigma);